
I also was looking into UF4007. At least their RRT time is WAY faster… the downside is that they have a forward voltage (FV) of 1.7V (instead of 1.1V for the 1N4007), which I would assume has have a negative effect on the COP.
You mentioned that you had Bedini SG with UF4007. Did the faster switching speed of the UF4007 yield a net positive result on the COP (over the negative higher FV of the UF4007)?
I also talked briefly with nick about Schottky diodes, C4D02120A. They are supposed to be even faster, but have FV range 1.4-1.9V… In case your UF yielded a net positive result on the COP, I think these Schottky might be a next thing to try, but since the FV is a range, would they need to be matched, like the Transistors?
Then there is the 1N5408 for the CG mode (or two in parallel, since I matched what you had), but here should have the same ON semiconductor versions as you have. Also here I contacted the supplier to ask for the SOT and RRT times, in case they are slower than the 1N4007 values, I assume that you machine could yield more output still if this would be the case, that is in the version where you still use them, since you also told me you removed them in another version, depending on the voltage difference in the input/output batteries.
Gary I have a feeling that this might be the issue in my machine… too slow/cheap 1N4007 diodes… makes at least a lot of sense from a logical point of view, taking everything into account we’ve discussed and tried so far.
What do you think???
What do you think???
regards,
Gary Hammond,


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